Automatic stop for knitting machines



J. G. CARLSON.

AUTOMATIC STOP FOR KNITTING MACHINES.

APPLICATION FILED APR. 23. 1920.

1,414,546., Patentd May 2, 1922.

STATESFPFATENT oFnc IA IAII a. crimson, or 'RooKro m, ILLINOIS,-AssIeNon TO amison KNITTING I COMPANY, or I ocKro tn' LLINoIs, A:COBPORATIQN or ILLINOIS.

AUTOMATIC s'rorrbu KL T'I'ING MACHINES.

To allwhomz't may concern; I v 1 Be it known that LJAHAN Gr. .CA LsoN, asubject of Sweden, residing at Rockford, in the county of Winnebago andState of Illinois, haveinvented certain new and useful Improvements inKnitting Machines, of which the following is a specification.

This invention pertainsingeneral to automatic stop mechanism employed inknitting machines, and while, being of general application I have in thepresent case, illustrated object I {accomplish by cans it inconnectionwith' an automatic stop device of the character disclosedinPatent No. 1,090,119.. 1 v

Stopimechanism of this particular character are actuated generally byinterruption or breaking of the yarn, rather than by the presence of aot, lumpor other obstrue tion carried on the yarn. Such obstructions,are of course, inimical toperfect knitting; The primary object of thepresentinventionis to. provide for the, automatic stopa stop.

' Still another object isthe provision of a sto pi dev'ice of thischaracter which will be of simple and practical construction andapplicable as an attachment to various stop devices, and especially tothose employing a sensitive trip rod of the character disclosed in thepatent mentioned above.

Referring tothe drawing,

Figure 1 is a front view of an automatic stop mechanism embodying myimprove- .ments Fig. 2, a side elevation thereof;

Fig. 3, a detail view of the lower end of the yarn guide adapted to beactuated by an obstruction on the yarn; an

Fig. 4, a diagrammatic View illustrating the action of said lower end ofthe thread guide.

The construction in general shown in Specification or Letters Patent.

Automatic Stops for breaking the Patented May 2,1922.-

Application filednpril 23,1920. san u ne. 37 ,071.

Figs. land 2, is taken from the abov e men tioned patent and servessimply as one example. illustrating the use of my improvements inconnection with a suitable automatic stop device and with suitable meansfor guiding'the yarn leading to the" yarn carrier. I

The drawing shows avertical post 5 carrying a horizontal supporting arm6.to which is secured a take-up carrying arm 7 and a thread guidesupport 8. The arm 7 carriesa spring tension arm 9 equipped at its rear.end with a thre ad-guiding'eye 1 1 and carries also a flexible'wiretake-up arm 12 equipped atits forward endwith an eye 10 through whichthe yarn passes to the yarn-carrier. Intermediate the take-up eye 10 andthe eye 11 v isinterposed a yarn-holding device designated generally by,character 13, the constructionof which is immaterial to the presentapplication. It is suflicient to state that the yarn from the spool orbobbin is drawnthrough the eye 11 thence through the tension or'yarnchecking device 18, and thence through the take-up eye 10 to. theyarn-carrier. I p i ,In the event that the yarn should break, the takeup arm 12 would swing upwardly and actuate a very sensitive trip rod 14,which in. turn sets off or causes the stop mechanism to function andstopithe operation. In this particular case, the trip rod is pivotallysupported at its end adjacentv to the post 5 and is adaptedto swing atits outer end' horizontally.to. the 1ef.t, viewi ng Fig.; 2, whereby toreleasethe holding dog 15 against which the thrus t'r od 16 bearsupwardly- I This thru st arm whenreleas e d the dog causes a clutch tobe shifted for driving connection to the machine. For a more thoroughdescription of this particular stop action, reference may be had totheabove mentioned patent; It should be understood, however, that mypresent improvements are in no way limited to use this particular stopaction.

Coming now to the present improvement, my invention contemplates theprovision of a yarn-actuable member preferably pivoted, and shaped toprovide a narrow elongated opening through passes but which-is sorestricted as to preclude the passage of a knot, lump or otherobstruction onthe yarn, such obstruction by contact with the pivotedmember actuates which the yarn normally the same and thusby operation ofthe trip I rod sets off the stop mechanism; In this particular instance,said member designated generally bycharacter 17is formed of wire andpivotally mounted: intermediate. its I ends at18 upon a suitable support19. The

upperend 21 of said member is disposed inimediately in front of the triprod 14, so that upon swinging of said member in a counterclockwisedirection viewing Fig. 2, the rod .14 will be'trippeol from its setposition, thus stopping the. machine. The lowerlend of said memberis'shape d as shown in Fig. 3, to

provide a narrow elongated opening 22 through which the yar'n23 normallypasses and this opening 22 merges fit'ltS lower end into a largeropening or eye 24:. The spring wire portions 25 defining the sides ofthe opening 22 constitute a restrictedyarngtude, "and it will beobserved that should a lump or obstruction as indicated by the characterr the yarn. It will be plainly seen, viewing Fig. 4', that when thelower end of the mem-' ber- 17 is swung to the right by the action ofthe knot 26, the latterwill follow down said member and pass through theeye 24: at the lower end thereof; Consequently, breakage of yarn isavoided and the. attendant may remove the lump or obstruction and Iretiethe parted ends of the yarn without necessity of 'rethreading theyarn through the various guides. i

7 It is believed,v that the foregoing conveys a clear understanding ofmyimprovement,

" and whileI have illustrated but a single Working embodiment thereof,itshould be manifest that it is susceptible of consideris s 6 ablechange in construction and arrangement withoutdeparting from the spiritand scope of the invention asexpressecl in the appended claims, inwhich- .Tclaim: 1

1. An automatic stop mechanism includ- 'ing a pivoted yarn actuablemember having a portion depending from its pivot and shaped topro'vide'a-narrow elongated opening terminating at itslower end in aneye, sald opening be ngfso restricted as to preyent the pa'ssage'of aknot'or other obstruction, whereby the'latter will actuate said memberfor initiating the stop action, and I I said eye permitting free passageof said obstruction without displacing the yarn from said member.

2. An automatic stop mechanism includ ingin combination with a trip rodadapted to initiate the stop action, a spring tension arm and a take-uparm through which arms the yarn passes in succession, and a yarnactuablemember operable between said tension arm and the trip rod and having anarend -in an eye, through which openingthe yarn passes, said memberadapted to be actuated by'a knot or other obstruction on'the yarn,whereby to actuate'said triprod, and

row, elongated opening terminating atone said eyeperm'itti'ng passage ofsaid obstruction without displacement of the yarn from said member. 1

3. In an automatic stop mechanism of the character described, a pivotedmember adapted upon being swung away from its normal position toinitiatejthe stop action, said member having a narrow elongated threadguiding opening terminating at one end in an eye,'said opening beingso,rev stricted as to prevent the passage ofa knot or other-obstruction,whereby the latter will move said member from its normal position toinitiate thestop action, and said eye permitting passage of saidobstruction ber.

JA A N G. CARLSON. I

without displacing the yarn from said mem

